Transaction Labels Visible Only to Receiver/Sender?

[McMurdo]

When I sent myself testnet coins from my phone to my computer, I added a transaction label. When I look at the transaction in bitcoind, I can see the label but when I look at the transaction in a block explorer, I don't see the label.

Are the only people who can see transaction labels the sender and the receiver?

Thank you.

[OgNasty]

When I sent myself testnet coins from my phone to my computer, I added a transaction label. When I look at the transaction in bitcoind, I can see the label but when I look at the transaction in a block explorer, I don't see the label.

Are the only people who can see transaction labels the sender and the receiver?

Thank you.

The only person who sees it is you.  That is to help you document your transactions and is not broadcast to the network.

[Deathwing]

Labels are clientside unless you are using a weird web wallet or something along those lines. Bitcoin core labels are only seen by you as you write them. No one else (including the receiver) will be able to see. (Unless they register your address using a label on the wallet they're using)

[RapTarX]

Labels are not visible to anyone but you unless the address is registered in the blockchain with signed message. If both the receiver & sender have labeled their address wih signed message, this will be visible in the blockchain.
You can label your public address here- https://www.blockchain.com/btc/tags?filter=4&offset=3400
Don't use such labeled address for sensitive financial activities, it will reveal your information.

[coupable]

Unless you add that label as an additional data to your transaction or your address is registered in the blockchain with a signed message , no one can see it but you. In this case it should be a client side label provided as an additional feature in your wallet to manage your addresses within.

As suggested above , you don't have to focus on this option as you may break your anonymity .

[khaled0111]

Labels are not visible to anyone but you unless the address is registered in the blockchain with signed message. If both the receiver & sender have labeled their address wih signed message, this will be visible in the blockchain.

I believe there is a small confusing here. Blockchain.com is a block explorer, it's not the blockchain.
Whenever you add a tag to one of your public addresses it will be only visible on blockchain.com for all transactions sent from/to that address. If you use another block explorer, you will not be able to see that tag as it's been saved only on blockchain.com database and not on the blockchain.

[RapTarX]

I believe there is a small confusing here. Blockchain.com is a block explorer, it's not the blockchain.
Whenever you add a tag to one of your public addresses it will be only visible on blockchain.com for all transactions sent from/to that address. If you use another block explorer, you will not be able to see that tag as it's been saved only on blockchain.com database and not on the blockchain.

I'm not confused by the blockchain (technology) & blockchain (explorer) but it's true that I thought tagging an address is available in most of the explorer & possible with the blockchain technology. Is it only available with blockchain.com?
Thank you for highlighting the mistake.

[nc50lc]

I'm not confused by the blockchain (technology) & blockchain (explorer) but it's true that I thought tagging an address is available in most of the explorer & possible with the blockchain technology.

Let me try to explain: In Bitcoin-qt, the client-part handles the "tagging" & those labels (tags) will be saved in the wallet.dat file not in the blk.dat files (blockchain).
In Blockchain(dot)com's case, those tags were saved in their website's database.

BTW, in blockcypher users can also add tags to addresses, but it's not authenticated by signed messages so anyone can write whatever they want.
Just like blockchain.com, it's not saved in the "blockchain".

[McMurdo]

To all:

I'm able to see the label on both laptop and phone by creating a receive request in bitcoin-qt with something written in the "message" field. When I scan the resulting QR code with mycelium on my phone, it labels the transaction with that message. I guess that's all transferred through extra fields in the QR code, and not part of the address itself, so that's why it can't be seen on a block explorer. Thanks!